package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;
import java.util.Objects;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;


    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 新增菜品
     * @param dishDTO
     */
    @Override
    @Transactional
    public void save(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.save(dish);
        Long id = dish.getId();
        //获取insert生成的主键值

        //口味表
        List<DishFlavor> flavors = dishDTO.getFlavors();

        if (flavors != null && !flavors.isEmpty()){
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(id));
            dishFlavorMapper.save(flavors);
        }

    }

    /**
     * 批量删除菜品
     * @param ids
     */
    @Override
    public void deleteByIds(List<Long> ids) {
        //判断当前菜品是否能够删除--是否起售
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (Objects.equals(dish.getStatus(), StatusConstant.ENABLE)){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }


        //判断当前菜品能否删除--是否被套餐关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds != null && !setmealIds.isEmpty()){
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表里的菜品数据
        //删除菜品关联的口味数据
        
        for (Long id : ids) {
            dishMapper.deleteById(id);
            dishFlavorMapper.deleteById(id);
        }

    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    @Override
    public DishVO getById(Long id) {
        //根据菜品ID查询菜品
        Dish dish = dishMapper.getById(id);

        //根据菜品Id查询菜品口味
        List<DishFlavor> list = dishFlavorMapper.getById(id);

        //将菜品数据和口味数据合并到DishVO里面
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(list);
        return dishVO;
    }

    /**
     * 修改菜品
     * @param dishDTO
     */
    @Override
    public void changeDish(DishDTO dishDTO) {

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.updateDish(dish);

        dishFlavorMapper.deleteById(dishDTO.getId());

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && !flavors.isEmpty()){
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(dishDTO.getId()));
            dishFlavorMapper.save(flavors);
        }
    }

    @Override
    public void startOrStop(Long id, Integer status) {
        Dish dish = new Dish();
        dish.setId(id);
        dish.setStatus(status);
        dishMapper.updateDish(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getById(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }


    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }


}
